sometimes it works and sometimes it doesnt. it has a period of like 2 months where it works perfectly and then 3weeks where i have to press it like 6 times to get it to turn on or turn off.
what are my options so its a bit more reliable?
That's a known issue with those pedals. If you're lucky, there's just a bit of dirt in the way, but you'll probably have to replace it.
this happened to me. The switch is probably broken. You can send it to Robert Keeley to have it fixed or you can replace the switch yourself if you know how to solder.